1 files changed, 121 insertions, 0 deletions
diff --git a/components/providers/cohere.rb b/components/providers/cohere.rb
new file mode 100644
index 0000000..9b9f045
--- /dev/null
+++ b/components/providers/cohere.rb
@@ -0,0 +1,121 @@
+# frozen_string_literal: true
+
+require 'cohere-ai'
+
+require_relative 'base'
+
+require_relative '../../logic/providers/cohere/tokens'
+require_relative '../../logic/helpers/hash'
+require_relative '../../logic/cartridge/default'
+
+module NanoBot
+  module Components
+    module Providers
+      class Cohere < Base
+        attr_reader :settings
+
+        CHAT_SETTINGS = %i[
+          model stream prompt_truncation connectors
+          search_queries_only documents citation_quality
+          temperature
+        ].freeze
+
+        def initialize(options, settings, credentials, _environment)
+          @settings = settings
+
+          cohere_options = if options
+                             options.transform_keys { |key| key.to_s.gsub('-', '_').to_sym }
+                           else
+                             {}
+                           end
+
+          unless @settings.key?(:stream)
+            @settings = Marshal.load(Marshal.dump(@settings))
+            @settings[:stream] = Logic::Helpers::Hash.fetch(
+              Logic::Cartridge::Default.instance.values, %i[provider settings stream]
+            )
+          end
+
+          cohere_options[:server_sent_events] = @settings[:stream]
+
+          @client = ::Cohere.new(
+            credentials: credentials.transform_keys { |key| key.to_s.gsub('-', '_').to_sym },
+            options: cohere_options
+          )
+        end
+
+        def evaluate(input, streaming, cartridge, &feedback)
+          messages = input[:history].map do |event|
+            { role: event[:who] == 'user' ? 'USER' : 'CHATBOT',
+              message: event[:message],
+              _meta: { at: event[:at] } }
+          end
+
+          if input[:behavior][:backdrop]
+            messages.prepend(
+              { role: 'USER',
+                message: input[:behavior][:backdrop],
+                _meta: { at: Time.now } }
+            )
+          end
+
+          payload = { chat_history: messages }
+
+          payload[:message] = payload[:chat_history].pop[:message]
+
+          payload.delete(:chat_history) if payload[:chat_history].empty?
+
+          payload[:preamble_override] = input[:behavior][:directive] if input[:behavior][:directive]
+
+          CHAT_SETTINGS.each do |key|
+            payload[key] = @settings[key] unless payload.key?(key) || !@settings.key?(key)
+          end
+
+          raise 'Cohere does not support tools.' if input[:tools]
+
+          if streaming
+            content = ''
+
+            stream_call_back = proc do |event, _parsed, _raw|
+              partial_content = event['text']
+
+              if partial_content && event['event_type'] == 'text-generation'
+                content += partial_content
+                feedback.call(
+                  { should_be_stored: false,
+                    interaction: { who: 'AI', message: partial_content } }
+                )
+              end
+
+              if event['is_finished']
+                feedback.call(
+                  { should_be_stored: !(content.nil? || content == ''),
+                    interaction: content.nil? || content == '' ? nil : { who: 'AI', message: content },
+                    finished: true }
+                )
+              end
+            end
+
+            @client.chat(
+              Logic::Cohere::Tokens.apply_policies!(cartridge, payload),
+              server_sent_events: true, &stream_call_back
+            )
+          else
+            result = @client.chat(
+              Logic::Cohere::Tokens.apply_policies!(cartridge, payload),
+              server_sent_events: false
+            )
+
+            content = result['text']
+
+            feedback.call(
+              { should_be_stored: !(content.nil? || content.to_s.strip == ''),
+                interaction: content.nil? || content == '' ? nil : { who: 'AI', message: content },
+                finished: true }
+            )
+          end
+        end
+      end
+    end
+  end
+end